Improvement in pumps



NTTED STATES J. n. PLANK, or rULAsKi, iowa.

IMPROVEMENT IN PUMPS.

Specilcatiou forming part of Letters Patent No. 40,70% dated November24,

-llo alb' whom it may concern:

' Beit known that I, J. H. PLANK, ol' Pulaski, in the county of Davisand State of Iowa, have invented a new and useful Improvement in Pumps;and I do hereby declare that the following is a full, clear, and exactdescription ofthe same, refer ence being had to the accompanyingdrawings, making part of this specitication, in which- Figure l is aperspective view of apump embodying my improvement. Fig. 2 is asectional elevation ofthe same. Fig. 3 is a plan of the same, and Fig. 4is a side elevation of a fragment of the pump.

Similar letters of reference indicate corresponding parts in the severalfigures.

Thisinvention relates to that class of singlebarrel pumps in which thewater is raised by two plungers which move alternately' in oppositedirections, and thus cause the water to discharge in a continuousstream.

The invention consists of twov plungers tted to work up and down in asingle barrel or cylinder, in combina-tion with two leversot' the firstand second order, fulerumed to posts which rise from two opposite sidesofthe barrel or cylinder, said levers being connected together by a pinwhich projects from the side of one ot' the levers and works in a slotin the other in such a manner that when one lever is moved up or down,acorresponding movement in a reverse direction is impartedto the other,whereby the two plungers are caused to alternately approach to andrecede from each other, and thus effect thc desired object, all as willbe hereinafter fully explained.

To enable others skilled in the art to which my invention appertains tofully understand the same,'I will proceed to describe its constructionand operation.

A represents the barrel or cylinder of a pump, which may be constructedof wood, metal, or of other suitable material.

B B are two plungers, of similar form and dimensions, having a centralaperture passing through them, which is covered by an ordinaryHap-valve.

(I C are two levers of the first and second class, respectively. Theselevers are fulcrumed by pins to posts DD, which rise from two oppositesides of the pump, barrel, or

cylinder A. The posts D D, if the pump be made of wood, may be attachedby screws or bolts, and if made of cast metal they may be cast nith andform a part of the cylinder. The lever C has a transverse slot, b, cutthrough it at its forward end to receive a pin, a, which projects fromthe lever C, whereby the two levers are connected together and receivemotion one from the other. .lhe plungers are rigidly attached to thelower end of two rods, E E, which are connected at their upper ends bypins c c with the levers C C, respectively, a hole being formed in theupper plunger between the central aperture and exterior for the rod ofthe lower plunger to work through. Tile water raised bythe action of theplungers enters the cylinder A through an opening, c, iu the bottom, andit escapes through a nozzle or spout, I.

fis a flap check-valve, covering the opening e in the bottom ofthepun'ip-cylinder.

It will be obvious from the-foregoing description that if the lever (lbe moved up or down, a corresponding movement in a contrary directionwill be given to the lever C',

so that when the pumpis at work the two plungers alternately approach toand recede from each other, and consequently one of them is alwayslifting and forcing water, thus keeping up a continuousdischarge fromthe nozzle. By removing the upper plunger from the bar rel and puttingthe lever G in place of the iever C', a single-acting pump is producedwhich possesses all ot' the advantages ot' the common single-actingcylimler-pumpf In case either of the plungers,t'rom any cause whatever,fail to work, and have to be removed to be repaired, the remainingplunger can be used alone.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The levers C and C', of thc first and second order, respectively,fulcrumed to posts D D and connected together by a pin, a, and slot I),in combination with the rods E E and plurr gers B B, when arranged tooperate in the manner andl for the purpose described.

J. H. PLANK. Witnesses:

HENRY H. TRIMBLE, JOEL H. SHARP.

